Video plays in power point but not after exporting to MP4

I have created a power point with a youTube video imbedded in two of the slides.

I set up an animation to have the video start the same time I have an animation grow the title. This is on slide 5 and 6.

It looks great when I view the recorded slide show.

When I export to MP4 you can hear the audio of the youtube video but the video does not play.